Differences

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--- boot_process [2026/02/19 00:31] – the boot process. hopefully written better than /storage whitetailani
+++ boot_process [2026/02/26 06:02] (current) – Added newlines after steps 3 and 4 to fix formatting benjamin
@@ Line 3: / Line 3: @@
 This boot process is universal to all PROXmobil3 units as best as I can surmise.
-. U-Boot starts up and loads the kernel.\\
+. U-Boot starts up and loads the kernel from the [[storage#rootfs|rootFS]] microSD card.\\
-. The kernel mounts the [[storage#rootfs|rootFS]] microSD card from /dev/sda1 to /, and the [[storage#initFS|initFS]] from /dev/sdb1 to /init\\
+. The kernel loads systemd from /usr/lib/systemd/systemd.\\
-. The kernel calls to /sbin/init, which later calls ''%%/init/tools/initexec.sh startup%%''. If the ''%%startup%%'' argument is not passed, the script tells you the only valid argument is ''%%startup%%'', then exits.\\
+. systemd attempts to mount the [[storage#initFS|initFS]] by searching for any partitions named ''%%init%%''. If it cannot find any volumes after 90 seconds, it shuts down.\\
-a. /init/tools/initexec.sh sets up a bunch of aliases and environment variables.\\
+. The kernel calls to /sbin/init, which later calls ''%%/init/tools/initexec.sh startup%%''. If the ''%%startup%%'' argument is not passed, the script tells you the only valid argument is ''%%startup%%'', then exits.\\
-b. initexec.sh ensures necessary directories are created, then checks and sets the device's distribution channel.\\
+a. /init/tools/initexec.sh sets up a bunch of aliases and environment variables.\\
-c. It calls a function ''%%do_startup%%'', which checks if there is software to run, and if not, installs it via a function ''%%install_archive%%''. This function misspells "archive" to "archvie" in an echo log.\\
+b. initexec.sh ensures necessary directories are created, then checks and sets the device's distribution channel.\\
-d. It checks if ''%%/init/tmp/reboot.flg exists%%'', and if so, reboots the device.\\
+c. It calls a function ''%%do_startup%%'', which checks if there is software to run, and if not, installs it via a function ''%%install_archive%%''. This function misspells "archive" to "archvie" in an echo log.\\
-e. It calls every script located in /init/autorun/, launching /efad/pgm/NxProx (the CapMetro software), then echoes "Startup completed".software).\\
+d. It checks if ''%%/init/tmp/reboot.flg exists%%'', and if so, reboots the device.\\
+e. It calls every script located in /init/autorun/, launching /efad/pgm/NxProx (the CapMetro software), then echoes "Startup completed".software).\\
 It is trivially easy to hijack this init sequence by modifying initexec.sh or just inserting a script into /init/autorun.